Punching-machine



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(No Model.) 2 Sheets-Sheet 1.

E. B. STIMPSON. PUNGHING MACHINE.

No. 525,872. Patented Sept. 11, 1894.

No Model.) 2 Sheets-Sheet 2.

E. B. STIMPSON. PUNGHING MACHINE.

N0. 525,872. Patented Sept. 11, 1894.

:uunuimnnumm NITE STATES EDWIN B. STIMPSON, OF BROOKLYN, NEW YORK.

PUNCHlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 525,872, datedSeptember 11, 1894.

Application filed September 23, 1393. Serial No. 486.293. (N model.)

To all whom it may concern.-

Be it known that I, EDWIN B. STIMPsoN, a citizen of the United States,residing at Brooklyn, in the county of Kings and State of New York, haveinvented certain new and useful Improvements in Punching-Machines, ofwhich the following is a specification.

This invention relates to the class of machines employed for punching aseries of holes in material fed intermittently under a reciprocatingpunch; and the object of the invention is, in part, to provide thefeed-wheel of the machine with a removable, ring cutting bed fitted on aflange on the feed-wheel; in part to provide the tubular punch with acurved horn having a bore which forms a continuation of the punch,whereby the bits of soft material removed by the punch are carried away;in part to provide an interchangeable presser-foot, and in part toimprove the general construction of the machine, all as will behereinafter described.

In the accompanying drawingsFigure 1 is a longitudinal verticalmid-section of a machine embodying my improvements. Fig. 2 is a verticaltransverse section in the plane indicated by line 2, 2, in Fig 1. Fig. 3is a transverse vertical section on line 3, 3, in Fig. 1. Figs 4 and 5are views of the presser-foot, detached. Fig. 6 is a detached view ofthe feed-wheel and its appurtenances, seen from the left in Fig. 1.Figs. 7 and 8 are, respectively, a face View and sectional view, of thecrank which actuates the feed. Fig. 9 is a plan view of the horizontalconnecting bar, detached. Fig. 10 is a view of the punch and plunger,detached. This view shows the parts as seen from the left in Fig. 1.

A represents the bed of the machine and A the standard. These form theframe of the machine and may be of cast iron, integral, and cored out asseen in Fig. 1. Mounted rotatively in the bed A, is a shaft, 0, providedwith a sheave or pulley, D, for driving. Fixed on the shaft is aneccentric, E, which is embraced by a yoke, a on a rod, a. This rod iscoupled at its upper end to a slide, b, mounted in slide-bearings in thestandard. In the head, A which forms a part of the standard, is mounteda plunger, 0, parallel with the slide 12, and this slide and the plungerare connected distance from the punching point.

by a bar d, which plays in a cored out recess in the overhanging part ofthe standard A. At one end this bar is secured to the slide 1), by aclamping-piece, d, and attaching screws, and at its other end it issecured to the plunger c, by a long clamping-piece, 61 The constructionof these parts is clearly shown in Fig. 9, where the clamping-piece dand a part of the bar d, are represented in section. Rotation of theshaft 0 imparts a vertical reciprocating motion to the plunger 0 throughthe the medium of the eccentric E, slide b, and

connecting bar 01.

\ The tubular punch, e, is secured in a punchcarrier, e which is hollowand is secured to the lower end of the plunger by a screw, e, whichpasses through a tenon, 6 on the carrier, said tenon fitting into a slotformed in the lower extremity of the plunger. In order that the bits orpieces of material cutout by the punch may be carried off and deliveredat a distance from the punching point, where they would otherwise fall a(1 ob cure work, the carrier e is providedwl h a curved tubular horn, ethe bore in which communi cates at its receiving end with the hollow ofthe punch e, as clearly shown in Fig. 2 and forms a continuation ofsame. The bits of material from the punch are driven upward and outthrough the horn c and fall from the delivery end thereof at aconsiderable The horn may be of any convenient length, and it will bearranged by preference, so as to deliver the bits ahead, or in thedirection of the feed.

It is not new to provide a punching machine with a box-like receptaclehousing the upper end of the punch tube, to receive the bits cut out bythe punch and to provide this receptacle with a discharging tube but Ifind that where the bits punched out are of soft material the only wayto eifect a clearance is to make the bore in the off-bearing tube orhorn continuous with that in the punch out to the delivery end, and tocurve this horn so as to direct the delivery where required.

The feed is effected by a serrated feedwheel, F, driven forwardintermittently by mechanism similar to that employed in some kinds ofsewing machines. On the bed is fixed by screws, g, a ring holder G forthe feed-wheel F. A friction shoe, It, provided with a retractingspring, h (seen in Fig. 6) bears on the feed-wheel, when said shoe ismoved in a direction to put its spring 71. under tension. On one end ofthe shoe h, is a laterally projecting stud, h, which is in the path ofthe outer, short arm of a rocking lever, 'i, fulcrumed on the frame. Theother or inner arm of the lever 21 is in the path of the pin, j, of acrank-disk j on the end of the shaft 0, whereby, when said shaftrotates, the crank-pin j, acts on and rocks the lever t, causing theouter arm of said lever to act on the stud h, and shift the shoe h. Theshoe bites on and shifts the feed-wheel in a well known way. In order toadjust the movement of the feed-wheel to that of the punch, theeccentric E may be shifted about the shaft G; and in order to vary thefeed to suit the size of the punch, or the distance apart of the holespunched, the crank-pin j, may be set nearer to or farther from the axisof the shaft 0. This may be effected by the construction illustrated inFigs. 7 and 8. A dovetail or undercut groove, j, is cut diametricallyacross the face of the crank-disk f, and in it is placed a slide-block9' The crank-pin, j, is a screw which passes through a clamping-washer,f, and screws into the block 3' By screwingin the pin the block andwasher are clamped fast to the crank-disk.

To provide a cutting bed for the punch e, the feed-wheel F is furnishedwith a flange, f, which is rabbeted to receive a ring, H, of brass,copper, or other suitable metal or material to receive and form a bedfora cutting punch. This ring H will fit the bearing flange snugly. Itwill be situateddirectly under the punch, and its outer periphery willcoincide, substantially, with the base of the teeth on the feed-wheel,so that when the material to be punched is in place and pressed downupon the feed-wheel it will rest solidly on the ring H which forms thepunching bed. This ring moves, of course,with the feed-wheel andmaterial, and therefore the punch will not touch it twice in successionat the same point. It is contemplated that the ring H will fit quitesnugly and tightly on the bearing flange so as not to slip thereon, butas a precautionary device, a hole or holes may be drilled, half in thebearing flange and half in the ring H, and pins or screws, (seen in Fig.2) be set therein.

I am aware that, broadly speaking, it is not new to provide a punchingmachine with a punching bed which shifts at each punching operation andI do not claim this. In my construction the removable punching bed ismounted on a flange or rim on the feed-wheel and the material punchedmoves in a plane tangent to the punching bed.

' To keep the goods or material pressed down upon the feed-wheel apresser-foot is employed; and for some kinds of goods a rolling foot ispreferred while for other kinds a nonrolling foot is desirable. Thepresser-foot herein shown is compound,or presses both of these forms offeet or pressers, either of which may be used, at will.

Figs. 1, 4 and 5 illustrate the construction of the foot best. On anarm, m, on the head of the machine, is adjustably mounted a socketpiece,a; and on this socket-piece is rotatively mounted a wheel, 0, whichforms the rolling foot. This wheel turns about a screw, 19, set in thependent portion of the socket-piece n. The non-rolling foot, 0", may bebrought down into operative position, as seen in Fig. 4, or be turned upso as to be inoperative, as seen in Figs. 1, 2 and 5. The non-rollingfoot 0 has a flat stem, 0, through which the screw 10 passes, and wherethe screw passes through said stem, the screw is embraced by ancecentric, 0 which may be secured to the pendent portion of thesocket-piece n. The nonrolling foot swings about this eccentric, wherebywhen the said foot is down in operative position, as in Fig. 4, itstands somewhat below the level of the rolling foot. This eccentric isnot absolutely essential, as the non-rolling foot might swingconcentrically with the rolling foot. To hold the non-rolling foot o ineither of its two positions, two notches or recesses, r, are formed inits stem, either of which may be made to engage with a locking stud, s",on a vertically sliding sleeve, 5, on the socketpiece 'Ib. The slide shas in it a slot, s, (seen in Fig. 1) in which plays the set-screw, .5which clamps the socket-piece n in place on the arm m.

I is the feed-guide, mounted adjustably on the bed A.

I do not limit myself to the precise construction and arrangement ofparts as herein shown as these may be varied to some extent withoutdeparting materially from my invention.

If the punch is designed for ornamenting the margins of leather tips andthe like, it may be made to punch a hole of any form desired, ascircular, square, triangular, &c. The punches may be readilyinterchanged by simply removing the carrier and substituting another inits place. The punch need not be removed from the carrier for thispurpose.

When the ring-shaped punching bed becomes too much roughened and wornfor use, it may be replaced by another.

Having thus described my invention, I claim 1. In a punching machine,the combination with a reciprocating cutting punch and a stationary bedto support the material to be punched, of a serrated feed-wheel whichprojects up through an aperture in the bed, a presser -foot arrangedover the said feedwheel, and a removable punching bed carried by saidfeedwheel and projecting also through the aperture in the bed,substantially as set forth.

2. In a punching machine, the combination with an apertured, stationarybed to support the goods to be punched, and a reciprocating cuttingpunch, of an intermittently rotating,

serrated feed-wheel which projects up through the aperture in thesupporting bed and is provided With a bearing flange f, adjacent to theserrated face, a removable ring-like punching bed mounted on the flangef under the punch, and a presser-foot arranged over the serrated face ofthe feed-wheel, substantially as set forth.

3. In a punching machine, the combination with an apertured, stationarybed A, a reciprocating cutting punch, and a feed-wheel F, provided witha serrated feeding surface and a lateral flange f, of a presser-footarranged over the feed-wheel, a ring-shaped punching bed H, mountedremovably on the said flange,

and means for preventing the rotation of the said punching bed about theflange, substantially as set forth.

4. In a punching machine, the combination with a reciprocating punch andan intermittent feeding mechanism for the material, of a compoundpresser-foot, comprising a rolling foot, 0, a non-rolling foot, 0",adapted to be turned up out of the Way when not in use, and meanssubstantially as described for holding said non-rolling foot in eitherof its two positions, the non-rolling foot taking under the rolling footwhen down in use.

5. In a punching machine, the combination with a reciprocating punch andan intermittent feeding mechanism for feeding the material under thepunch, of the presser-foot, comprising the socket-piece, n, the armym,on which said piece is mounted, the rolling foot, 0, mounted on thependent portion of the socket-piece, the screw, 10, the non-rollingfoot, 0 having a stem, 0', provided with two notches r, and the slidinglocking sleeve 3, mounted on the socket-piece and provided with alocking stud to engage the said notches in the stem of the non-rollingfoot, as set forth.

6. In a punching machine, a tubular punch having the upper end of itsstraight bore connected with and registering with a curved bore whichforms a continuation and prolongation of the bore in the punch andserves to carry away and deliver the bits removed by the punch.

7. In a punching machine, the combination with the reciprocatingplunger, of the tubular punch-carrier mounted on the plunger and havinga laterally projecting horn provided with a curved bore which forms aprolongation of the socket in the carrier which receives the punch, andthe said punch, all arranged to operate substantially as set forth.

8. In a punching machine, the combination with the reciprocatingplunger, slotted at its lower end, of the hollow punch carrier providedwith a tenon to engage said slot and an integral, laterally projecting,tubular horn, the screw which secures the carrier to the plunger, andthe punch set in the carrier, substantially as set forth.

In witness whereof I have hereunto signed my name in the presence of twosubscribing witnesses.

EDWIN B. STIMPSON.

Witnesses:

HENRY OoNNE'rT, J AMES K. DUFFY.

